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https://issues.apache.org/jira/browse/UIMA-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jerry Cwiklik closed UIMA-1821.
-------------------------------
Fix Version/s: 2.3AS
Resolution: Fixed
Modified UIMA AS client code to check the state of a client to avoid
de-referencing objects nullified while stopping the client.
> Fix NPE in the UIMA AS client
> -----------------------------
>
> Key: UIMA-1821
> URL: https://issues.apache.org/jira/browse/UIMA-1821
> Project: UIMA
> Issue Type: Bug
> Components: Async Scaleout
> Affects Versions: 2.3AS
> Reporter: Jerry Cwiklik
> Assignee: Jerry Cwiklik
> Fix For: 2.3AS
>
>
> The following NPE is thrown in the UIMA AS client:
> WARNING:
> java.lang.NullPointerException
> at
> org.apache.uima.adapter.jms.client.BaseUIMAAsynchronousEngineCommon_impl.handleMetadataReply(BaseUIMAAsynch
> ronousEngineCommon_impl.java:999)
> at
> org.apache.uima.adapter.jms.client.BaseUIMAAsynchronousEngineCommon_impl.onMessage(BaseUIMAAsynchronousEngi
> neCommon_impl.java:1678)
> at
> org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1021)
> at
> org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:122)
> at
> org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:192)
> at
> org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122)
> at
> org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> it seems that the application has called stop() method before a getMeta reply
> came back from a service. When stopping, the UIMA AS client invalidates some
> objects which leads to the NPE. Modify client code to check the state of the
> client while handling replies.
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